THE LIMBS. 



199 



the points where the wall suddenly bends inwards 

 and forwards, the " buttresses" (1 and 4) the inner 

 reflected ends, which nearly reach the center of the 

 sole, the "bars" (5 and 6). 



FIG. 26. Under surface of hoof of horse (from Lei- 

 sering). 1, 2, 3, and 4, the wall; the part be- 

 tween 2 and 3 being the toe ; between 1 and 2, 

 and 4 and 3, the outside and inside quarters ; 1 and 

 4, the buttresses or angles of inflection of the wall 

 to form the bars, 5 and 6 ; 7, the sole ; 8, the point 

 of the frog ; 9 and 10, the branches of the frog ; 

 11 and 12, the lateral lacunse ; 13, the median la- 

 cuna ; 14, the heels. 



The space between the lower edges of the wall is 

 filled up in front by a flat or rather concave plate of 

 a crescentic shape, called the "sole" (7), composed 



of softer and less fibrous material than the wall. Its 

 14 



